NS DATA Linker file - TF-M

12 Mar 2020


      Hello,
It looks like there is a mistake for ER_DATA region in  the NS armclang linker file.
...
    ER_DATA NS_DATA_START NS_DATA_SIZE {
        * (+ZI +RW)
    }
/* MSP */
    ARM_LIB_STACK_MSP +0 ALIGN 32 EMPTY NS_MSP_STACK_SIZE {
    }
/* PSP */
    ARM_LIB_STACK +0 ALIGN 32 EMPTY NS_PSP_STACK_SIZE {
    }
ARM_LIB_HEAP +0 ALIGN 8 EMPTY NS_HEAP_SIZE {
    }
...
ER_DATA does not take into account the NS_MSP_STACK_SIZE+NS_PSP_STACK_SIZE+EMPTY NS_HEAP_SIZE size:
#define NS_DATA_SIZE    (TOTAL_RAM_SIZE - S_DATA_SIZE)
Guess, the NS linker file should be:
...
    ER_DATA NS_DATA_START NS_DATA_SIZE-NS_MSP_STACK_SIZE-NS_PSP_STACK_SIZE-EMPTY NS_HEAP_SIZE {
        * (+ZI +RW)
    }
...
Or, did I miss something?
Thank you,
Andrej Butok